What do you mean there isn't one?

Get to the Credits screen in less than 3 Minutes, from the start of the level

Beat Robotnik

200 Rings might be harder than it sounds.

Collect 100 Rings.

Have 6 lives

Robuttnik activated Ice Physics

Do what the ball do, on the ball

Get over 30000 points

What? THAT WAS IT???

Have a shield active at the same time as the Speed Shoes and Invincibility

Change the weather at the press of a button

Beat Robotnik without taking damage

Showed mastery of riding a ball [You can retry by going as far left as you can with the first ball]